support proposition 30 as the state sales on the income tax hike that they say, they would stop more education cuts, targeting undecided voters. those making up their minds in the polling booth or who are waiting until the last possible minute to mail in their ball los -- ballots and plenty of them are. >> if you have not mailed them yet, you are getting risky about that ballot. >> reporter: he has talked to the civic groups, claiming they are still undecided. not about who to pick for president, but about what proposition to support. it shows. >> if you look at our tally equipment, you can see where people changed their mind. not on candidates, but on measures. >> that 11th hour head scratching is putting a squeeze on san francisco to this area, even though it will be lower than in 2008. those voting, they are waiting and waiting. causing an influx of the last- minute ballot and forcing ballot counters to work overtime. >> i have never done a split shift before. >>> until now and with so many mail-in ballots still out. it's a sign that there is time to sway votes on those still waiting. >> re